Hydraulic oil cylinder high-precision synchronous control complete device of oversized heavy equipment

Abstract

The utility model discloses hydraulic oil cylinder high-precision synchronous control complete equipment of oversized heavy equipment, which comprises a plurality of hydraulic oil cylinders, a synchronous controller, a synchronous flow divider, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a plurality of first pressure sensors, a plurality of second pressure sensors and a plurality of displacement sensors, the first pressure sensors and the second pressure sensors are used for pressure in rod cavities and rodless cavities of the hydraulic oil cylinders respectively, the displacement sensors are used for detecting displacement of piston rods of the hydraulic oil cylinders, and the first pressure sensors, the second pressure sensors and the displacement sensors are connected to an input end set of the synchronous controller. And the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve are electrically connected to an output end group of the synchronous controller. The system has the remarkable effects that accurate synchronous control of the multiple hydraulic oil cylinders is realized by controlling oil inlet and outlet of the hydraulic oil cylinders.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic equipment control, in particular to a complete set of high-precision synchronous control devices for hydraulic cylinders of super-large heavy equipment. Background Art

[0002] At present, hydraulic cylinders are widely used as the power source for large and heavy equipment. When large and heavy equipment is in motion, each hydraulic cylinder needs to be synchronized. However, most existing hydraulic control systems are in a series structure, which is prone to pressure imbalance in the pressure stroke between multiple cylinders. That is, the oil input to the front and rear hydraulic cylinders in the series queue is not equal, resulting in unequal pressure output values ​​of each cylinder at the same time, making it difficult to ensure the synchronization of the movement of large and heavy equipment.

[0003] In view of this, a high-precision synchronous control device for the hydraulic cylinders of super-large heavy equipment is needed to solve the possible asynchronous defects in the action process of multiple cylinders. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a high-precision synchronous control set of hydraulic cylinders for super-large heavy equipment, which controls the oil in and out of the hydraulic cylinders by detecting the displacement and pressure of the hydraulic cylinders, thereby achieving precise synchronous control of multiple hydraulic cylinders.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A high-precision synchronous control complete set of hydraulic cylinders for super-large heavy equipment, the key of which is: comprising multiple hydraulic cylinders and synchronous controllers, synchronous flow dividers, a first solenoid valve, a second solenoid valve, a third solenoid valve, multiple first pressure sensors, multiple second pressure sensors, and multiple displacement sensors, the inlet of the synchronous flow divider is connected to the hydraulic oil supply system through an oil supply main pipe, the multiple outlets of the synchronous flow divider are connected to the rodless chambers of multiple hydraulic cylinders through multiple oil supply branch pipes in a one-to-one correspondence, the first solenoid valve is arranged on each oil supply branch pipe, the rod chamber of each hydraulic cylinder is connected to the hydraulic oil supply system through a return oil pipe, the second solenoid valve is arranged on the return oil pipe, the rodless chambers of the multiple hydraulic cylinders are also connected to the high-pressure oil supply system through a booster oil pipe, and each booster oil pipe is provided with a third solenoid valve;

[0007] Multiple first pressure sensors and second pressure sensors are respectively used for the pressure in the rod chamber and rodless chamber of each hydraulic cylinder, and multiple displacement sensors are used to detect the displacement of the piston rod of each hydraulic cylinder. The first pressure sensor, the second pressure sensor, and the displacement sensor are connected to the input end group of the synchronous controller, and the first solenoid valve, the second solenoid valve, and the third solenoid valve are electrically connected to the output end group of the synchronous controller.

[0008] Furthermore, the synchronous controller is also provided with an alarm module.

[0009] Furthermore, the alarm module adopts one of a sound alarm module, a light alarm module or a sound and light alarm module.

[0010] Furthermore, the synchronous controller is also connected to a communication module, and the communication module is used to communicate with a remote control center.

[0011] Furthermore, the communication module adopts at least one of a 4G communication module, a 5G communication module or a WIFI communication module.

[0012] Furthermore, the first solenoid valve, the second solenoid valve and the third solenoid valve are all high-pressure valves.

[0013] Furthermore, the synchronization controller is a PLC controller.

[0014] Furthermore, the hydraulic oil supply system and the high-pressure oil supply system both include an oil storage tank, a filter, an oil pump and a hydraulic lock.

[0015] The remarkable effect of the present utility model is that by detecting the displacement of the piston rods of multiple hydraulic cylinders and the pressure of the rod chamber and the rodless chamber of the hydraulic cylinder at the same time, the displacement distance of the piston rod of the hydraulic cylinder is judged according to the displacement detection signal, and the pressure value in the rod chamber and the rodless chamber of each hydraulic cylinder is obtained according to the pressure detection signal of the rod chamber and the rodless chamber of the hydraulic cylinder, and a collaborative judgment is made according to the displacement distance and the pressure value in the rod chamber and the rodless chamber of the hydraulic cylinder to generate different control instructions, and then by controlling the oil in and out of the hydraulic cylinder, precise synchronous control of multiple hydraulic cylinders is realized, thereby overcoming the defect in the prior art that the oil amount input to the hydraulic cylinders at the front and rear of the series queue is not equal, resulting in unequal pressure output values ​​of each cylinder at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the pipeline principle diagram of the utility model;

[0017] Figure 2 It is the control principle block diagram of the utility model;

[0018] Figure 3 It is a piping schematic diagram of the hydraulic oil supply system and the high-pressure oil supply system. DETAILED DESCRIPTION

[0019] The specific implementation manner and working principle of the utility model are further described in detail below with reference to the accompanying drawings.

[0020] like Figure 1As shown, a high-precision synchronous control set of hydraulic cylinders of super-large heavy equipment includes multiple hydraulic cylinders, a synchronous diverter, a first solenoid valve, a second solenoid valve, a third solenoid valve, a first pressure sensor, a second pressure sensor, and a displacement sensor. The inlet of the synchronous diverter is connected to the hydraulic oil supply system through an oil supply main pipe, and the multiple outlets of the synchronous diverter are connected to the rodless chambers of multiple hydraulic cylinders through multiple oil supply branch pipes in a one-to-one correspondence. The first solenoid valve is arranged on each oil supply branch pipe, and the rod chamber of each hydraulic cylinder is connected to the hydraulic oil supply system through a return oil pipe, and the second solenoid valve is arranged on the return oil pipe. The rodless chambers of the multiple hydraulic cylinders are also connected to the high-pressure oil supply system through a boosting oil pipe, and each boosting oil pipe is provided with a third solenoid valve. The first pressure sensor and the second pressure sensor are respectively used for the pressure in the rod chamber and the rodless chamber of each hydraulic cylinder.

[0021] See attached Figure 2 The synchronous control set also includes a synchronous controller and a displacement sensor. The displacement sensor is used to detect the displacement of each hydraulic cylinder piston rod. The first pressure sensor, the second pressure sensor, and the displacement sensor are connected to the input end group of the synchronous controller. The first solenoid valve, the second solenoid valve, and the third solenoid valve are electrically connected to the output end group of the synchronous controller. The synchronous controller is also provided with an alarm module and a communication module. The communication module is used to communicate with the remote control center.

[0022] like Figure 3 As shown, the hydraulic oil supply system in this example has the same structure as the high-pressure oil supply system, and both include an oil storage tank, a filter, an oil pump and a hydraulic lock. In addition, the high-pressure oil supply system also includes a booster pump to ensure that the high-pressure oil can be input into the hydraulic cylinder.

[0023] Preferably, the alarm module adopts an audible and visual alarm module; the communication module adopts a 5G communication module; the first solenoid valve, the second solenoid valve, and the third solenoid valve all adopt high-pressure valves; and the synchronous controller is a PLC controller.

[0024] The working principle of this device is as follows:

[0025] Multiple displacement sensor pairs detect the displacement of the piston rod of each hydraulic cylinder and upload the displacement signal detection signal to the synchronous controller;

[0026] A plurality of first pressure sensors and second pressure sensors respectively detect the pressure in the rod chamber and rodless chamber of each hydraulic cylinder, and upload the pressure detection signal to the synchronous controller;

[0027] The synchronous controller determines the displacement distance of the piston rod of each hydraulic cylinder according to the displacement detection signal, and calculates the displacement difference between it and the preset displacement value;

[0028] The synchronous controller obtains the actual pressure values ​​of the rod chamber and the rodless chamber of each hydraulic cylinder according to the pressure detection signal, and calculates the first pressure difference between the actual pressure value of the rod chamber of the hydraulic cylinder and the preset rod chamber pressure value, and simultaneously calculates the second pressure difference between the actual pressure value of the rodless chamber of the hydraulic cylinder and the preset rodless chamber pressure value;

[0029] The synchronous controller judges the obtained displacement difference, the first pressure difference, and the second pressure difference, and generates control signals to the first solenoid valve, the second solenoid valve, and the third solenoid valve, thereby realizing synchronous control of multiple cylinders by controlling the oil in and out of the hydraulic cylinder. The specific judgment rules and corresponding control signals are as follows:

[0030] When the displacement difference is not less than the first preset threshold, if the first pressure difference is not greater than the second preset threshold, and the second pressure difference is not greater than the third preset threshold, the first solenoid valve is controlled to be closed, and the second solenoid valve and the third solenoid valve are controlled to be opened, and the high-pressure oil supply system replenishes a certain amount of high-pressure oil into the rodless cavity of the hydraulic cylinder, and the high-pressure oil causes the displacement of the piston rod of the hydraulic cylinder to reach the preset displacement value;

[0031] When the displacement difference is not less than the first preset threshold, and the first pressure difference is greater than the second preset threshold, and the second pressure difference is not greater than the third preset threshold, there may be leakage in the hydraulic cylinder or the return pipe. At this time, the synchronous controller sends an alarm signal to the alarm module for alarm processing, and uploads the alarm signal to the remote control center to remind relevant personnel to handle it in time;

[0032] When the displacement difference is not less than the first preset threshold, and the first pressure difference is not greater than the second preset threshold, and the second pressure difference is greater than the third preset threshold, the first solenoid valve and the second solenoid valve are controlled to be closed, and the third solenoid valve is opened, and the hydraulic oil supply system and the high-pressure oil supply system simultaneously add a certain amount of high-pressure oil into the rodless cavity of the hydraulic cylinder, and determine the opening time of the third solenoid valve according to the second pressure difference, so that the piston rod displacement of the hydraulic cylinder reaches the preset displacement value through a larger amount of high-pressure oil;

[0033] When the displacement difference is less than the first preset threshold, it means that the hydraulic cylinders have good synchronization. At this time, the first solenoid valve, the second solenoid valve, and the third solenoid valve are controlled to be closed, and the corresponding action can be performed according to the next action instruction of the hydraulic cylinder.

[0034] The device described in this embodiment detects the displacement of the piston rods of multiple hydraulic cylinders and the pressure of the rod chamber and rodless chamber of the hydraulic cylinder at the same time, thereby judging the displacement distance of the piston rod of the hydraulic cylinder according to the displacement detection signal, and obtaining the pressure value in the rod chamber and rodless chamber of each hydraulic cylinder according to the pressure detection signal of the rod chamber and rodless chamber of the hydraulic cylinder, and makes a collaborative judgment based on the displacement distance and the pressure value in the rod chamber and rodless chamber of the hydraulic cylinder to generate different control instructions, and then realizes precise synchronous control of multiple hydraulic cylinders by controlling the oil in and out of the hydraulic cylinder.

[0035] The technical solution provided by the utility model is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A complete set of high-precision synchronous control devices for hydraulic cylinders of super-large heavy equipment, comprising a plurality of hydraulic cylinders and a synchronous controller, characterized in that: It also includes a synchronous flow divider, a first solenoid valve, a second solenoid valve, a third solenoid valve, a plurality of first pressure sensors, a plurality of second pressure sensors, and a plurality of displacement sensors. The inlet of the synchronous flow divider is connected to the hydraulic oil supply system through an oil supply main pipe, and the plurality of outlets of the synchronous flow divider are connected to the rodless chambers of a plurality of hydraulic cylinders through a plurality of oil supply branch pipes in a one-to-one correspondence. The first solenoid valve is arranged on each oil supply branch pipe, and the rod chamber of each hydraulic cylinder is connected to the hydraulic oil supply system through a return oil pipe, and the second solenoid valve is arranged on the return oil pipe. The rodless chambers of the plurality of hydraulic cylinders are also connected to the high-pressure oil supply system through a booster oil pipe, and each booster oil pipe is provided with a third solenoid valve; Multiple first pressure sensors and second pressure sensors are respectively used for the pressure in the rod chamber and rodless chamber of each hydraulic cylinder, and multiple displacement sensors are used to detect the displacement of the piston rod of each hydraulic cylinder. The first pressure sensor, the second pressure sensor, and the displacement sensor are connected to the input end group of the synchronous controller, and the first solenoid valve, the second solenoid valve, and the third solenoid valve are electrically connected to the output end group of the synchronous controller.

2. The high-precision synchronous control device for the hydraulic cylinder of super-large heavy equipment according to claim 1 is characterized in that: The synchronous controller is also provided with an alarm module.

3. The high-precision synchronous control device for the hydraulic cylinder of super-large heavy equipment according to claim 2 is characterized in that: The alarm module adopts one of a sound alarm, a light alarm or an acousto-optic alarm module.

4. The high-precision synchronous control device for the hydraulic cylinder of super-large heavy equipment according to claim 1 is characterized in that: The synchronous controller is also connected to a communication module, which is used for communication with a remote control center.

5. The high-precision synchronous control device for the hydraulic cylinder of super-large heavy equipment according to claim 4 is characterized in that: The communication module adopts at least one of a 4G communication module, a 5G communication module or a WIFI communication module.

6. The high-precision synchronous control device for the hydraulic cylinder of super-large heavy equipment according to claim 1 is characterized in that: The first solenoid valve, the second solenoid valve and the third solenoid valve are all high-pressure valves.

7. The high-precision synchronous control device for the hydraulic cylinder of super-large heavy equipment according to claim 1 is characterized in that: The synchronous controller is a PLC controller.

8. The high-precision synchronous control device for the hydraulic cylinder of super-large heavy equipment according to any one of claims 1 to 7, characterized in that: The hydraulic oil supply system and the high-pressure oil supply system both include an oil storage tank, a filter, an oil pump and a hydraulic lock.

Images